- Thu Jun 07, 2018 2:43 pm
#76350
I'm trying to add a RTC to this module:
https://www.banggood.com/Wemos-ESP32-OL ... rehouse=CN
My hardware also includes a DHT22 temperature and humidity sensor.
First, I tried using the same pins for SDA and SDC as used by the SH1106 model (pins 5 & 4). That did not work. The RTC fails as soon as the display is initialized.There appears to be some sort of conflict between the OLED and the DS3231 RTC. So I installed the RTC on different SDA and SDC pins. The RTC code works as expected until the display is initialized just as before.
Here is my sketch:
I would like to be able to plot temperature and humidity vs time.
Does anybody have any idea why the RTC is failing after the SH1106 is initialized??
https://www.banggood.com/Wemos-ESP32-OL ... rehouse=CN
My hardware also includes a DHT22 temperature and humidity sensor.
First, I tried using the same pins for SDA and SDC as used by the SH1106 model (pins 5 & 4). That did not work. The RTC fails as soon as the display is initialized.There appears to be some sort of conflict between the OLED and the DS3231 RTC. So I installed the RTC on different SDA and SDC pins. The RTC code works as expected until the display is initialized just as before.
Code: Select all
Begin serial
06/07/2018 14:43:39
RTC is newer than compile time. (this is expected)
Connecting to *********
.
WiFi connected
Web server running. Waiting for the ESP IP...
10.0.1.102
06/07/2018 14:43:54
RTC lost confidence in the DateTime!
85/165/2009 37:165:
-0.25C
Here is my sketch:
Code: Select all
#include <DHT.h>
#include <DHT_U.h>
/**
* The MIT License (MIT)
*
* Copyright (c) 2018 by ThingPulse, Daniel Eichhorn
* Copyright (c) 2018 by Fabrice Weinberg
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* ThingPulse invests considerable time and money to develop these open source libraries.
* Please support us by buying our products (and not the clones) from
* https://thingpulse.com
*
*/
// Include the correct display library
// For a connection via I2C using Wire include
#include <Wire.h> // Only needed for Arduino 1.6.5 and earlier
//#include "SSD1306Wire.h" // legacy include: `#include "SSD1306.h"`
// or #include "SH1106Wire.h", legacy include: `#include "SH1106.h"`
// For a connection via I2C using brzo_i2c (must be installed) include
//#include <brzo_i2c.h> // Only needed for Arduino 1.6.5 and earlier
//#include "SSD1306Brzo.h"
#include "SH1106.h"
//#include "SH1106Brzo.h"
// For a connection via SPI include
// #include <SPI.h> // Only needed for Arduino 1.6.5 and earlier
// #include "SH1106SPi.h"
// Include custom images
#include "images.h"
//#include "DS3231.h"
//DS3231 Clock;
#include <RtcDS3231.h> //RTC library
RtcDS3231<TwoWire> Rtc(Wire);
bool Century=false;
bool h12;
bool PM;
byte ADay, AHour, AMinute, ASecond, ABits;
bool ADy, A12h, Apm;
// Initialize the OLED display using SPI
// D5 -> CLK
// D7 -> MOSI (DOUT)
// D0 -> RES
// D2 -> DC
// D8 -> CS
// SSD1306Spi display(D0, D2, D8);
// or
// SH1106Spi display(D0, D2);
// Initialize the OLED display using brzo_i2c
// D3 -> SDA
// D5 -> SCL
// SSD1306Brzo display(0x3c, D3, D5);
// or
//SH1106Brzo display(0x3c, D3, D5);
//SH1106Brzo display(0x3c, D3, D5);
//SSD1306Brzo display(0x3c, 5, 4);
// Initialize the OLED display using Wire library
//SSD1306Wire display(0x3c, D3, D5);
//SSD1306Wire display(0x3c, 5, 4);
//SH1106 display(0x3c, D3, D5);
SH1106 display(0x3c, 5, 4);
//SH1106Brzo display(0x3c, 5, 4);
#define DEMO_DURATION 3000
typedef void (*Demo)(void);
#include "DHT.h"
#define DHTPIN 2 // what pin we're connected to
#define DHTTYPE DHT22 // DHT 22 (AM2302)
DHT dht(DHTPIN, DHTTYPE); //// Initialize DHT sensor for normal 16mhz Arduino
#include <ESP8266WiFi.h>
// Replace with your network details
const char* ssid = "*******";
const char* password = "*********";
// Web Server on port 80
WiFiServer server(80);
// Temporary variables
static char celsiusTemp[7];
static char fahrenheitTemp[7];
static char humidityTemp[7];
int demoMode = 0;
int counter = 1;
void setup() {
Serial.begin(74880);
Serial.println("Begin serial");
Serial.println();
Serial.println();
//--------RTC SETUP ------------
// if you are using ESP-01 then uncomment the line below to reset the pins to
// the available pins for SDA, SCL
// Wire.begin(0, 2); // due to limited pins, use pin 0 and 2 for SDA, SCL
Wire.begin(14,12);
Rtc.Begin();
RtcDateTime compiled = RtcDateTime(__DATE__, __TIME__);
printDateTime(compiled);
Serial.println();
if (!Rtc.IsDateTimeValid())
{
// Common Cuases:
// 1) first time you ran and the device wasn't running yet
// 2) the battery on the device is low or even missing
Serial.println("RTC lost confidence in the DateTime!");
// following line sets the RTC to the date & time this sketch was compiled
// it will also reset the valid flag internally unless the Rtc device is
// having an issue
Rtc.SetDateTime(compiled);
}
if (!Rtc.GetIsRunning())
{
Serial.println("RTC was not actively running, starting now");
Rtc.SetIsRunning(true);
}
RtcDateTime now = Rtc.GetDateTime();
if (now < compiled)
{
Serial.println("RTC is older than compile time! (Updating DateTime)");
Rtc.SetDateTime(compiled);
}
else if (now > compiled)
{
Serial.println("RTC is newer than compile time. (this is expected)");
}
else if (now == compiled)
{
Serial.println("RTC is the same as compile time! (not expected but all is fine)");
}
// never assume the Rtc was last configured by you, so
// just clear them to your needed state
Rtc.Enable32kHzPin(false);
Rtc.SetSquareWavePin(DS3231SquareWavePin_ModeNone);
// Connecting to WiFi network
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
// Starting the web server
server.begin();
Serial.println("Web server running. Waiting for the ESP IP...");
delay(10000);
// Printing the ESP IP address
Serial.println(WiFi.localIP());
if (!Rtc.IsDateTimeValid())
{
// Common Cuases:
// 1) the battery on the device is low or even missing and the power line was disconnected
Serial.println("RTC lost confidence in the DateTime!");
}
now = Rtc.GetDateTime();
printDateTime(now);
Serial.println();
// Initialising the UI will init the display too.
display.init();
display.flipScreenVertically();
display.setFont(ArialMT_Plain_10);
}
void drawFontFaceDemo() {
// Font Demo1
// create more fonts at http://oleddisplay.squix.ch/
display.setTextAlignment(TEXT_ALIGN_LEFT);
display.setFont(ArialMT_Plain_10);
display.drawString(0, 0, "Hello world");
display.setFont(ArialMT_Plain_16);
display.drawString(0, 10, "Hello world");
display.setFont(ArialMT_Plain_24);
display.drawString(0, 26, "Hello world");
}
void drawTemperature() {
// Font Demo1
// create more fonts at http://oleddisplay.squix.ch/
display.setTextAlignment(TEXT_ALIGN_LEFT);
display.setFont(ArialMT_Plain_10);
display.drawString(0, 0, "Temperature");
char str[10];
float tf = dht.readTemperature(true, false);
sprintf(str, "%.2f°F", tf);
display.setFont(ArialMT_Plain_24);
display.drawString(0, 10, str);
float tc = dht.convertFtoC(tf);
sprintf(str, "%.2f°C", tc);
display.setFont(ArialMT_Plain_24);
display.drawString(0, 34, str);
}
void drawHumidity() {
// Font Demo1
// create more fonts at http://oleddisplay.squix.ch/
display.setTextAlignment(TEXT_ALIGN_LEFT);
display.setFont(ArialMT_Plain_10);
display.drawString(0, 0, "Humidity/Heat Index:");
char str[10];
float h = dht.readHumidity(false);
sprintf(str, "%.2f%%", h);
display.setFont(ArialMT_Plain_24);
display.drawString(0, 10, str);
float tf = dht.readTemperature(true, false);
float x = dht.computeHeatIndex(tf, h, true);
sprintf(str, "%.2f°F", x);
display.setFont(ArialMT_Plain_24);
display.drawString(0, 34, str);
}
void drawTextFlowDemo() {
display.setFont(ArialMT_Plain_10);
display.setTextAlignment(TEXT_ALIGN_LEFT);
display.drawStringMaxWidth(0, 0, 128,
"Lorem ipsum\n dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore." );
}
void drawTextAlignmentDemo() {
// Text alignment demo
display.setFont(ArialMT_Plain_10);
// The coordinates define the left starting point of the text
display.setTextAlignment(TEXT_ALIGN_LEFT);
display.drawString(0, 10, "Left aligned (0,10)");
// The coordinates define the center of the text
display.setTextAlignment(TEXT_ALIGN_CENTER);
display.drawString(64, 22, "Center aligned (64,22)");
// The coordinates define the right end of the text
display.setTextAlignment(TEXT_ALIGN_RIGHT);
display.drawString(128, 33, "Right aligned (128,33)");
}
void drawRectDemo() {
// Draw a pixel at given position
for (int i = 0; i < 10; i++) {
display.setPixel(i, i);
display.setPixel(10 - i, i);
}
display.drawRect(12, 12, 20, 20);
// Fill the rectangle
display.fillRect(14, 14, 17, 17);
// Draw a line horizontally
display.drawHorizontalLine(0, 40, 20);
// Draw a line horizontally
display.drawVerticalLine(40, 0, 20);
}
void drawCircleDemo() {
for (int i=1; i < 8; i++) {
display.setColor(WHITE);
display.drawCircle(32, 32, i*3);
if (i % 2 == 0) {
display.setColor(BLACK);
}
display.fillCircle(96, 32, 32 - i* 3);
}
}
void drawProgressBarDemo() {
int progress = (counter / 5) % 100;
// draw the progress bar
display.drawProgressBar(0, 32, 120, 10, progress);
// draw the percentage as String
display.setTextAlignment(TEXT_ALIGN_CENTER);
display.drawString(64, 15, String(progress) + "%");
}
void drawImageDemo() {
// see http://blog.squix.org/2015/05/esp8266-nodemcu-how-to-create-xbm.html
// on how to create xbm files
display.drawXbm(34, 14, WiFi_Logo_width, WiFi_Logo_height, WiFi_Logo_bits);
}
Demo demos[] = {/*drawFontFaceDemo, drawTextFlowDemo, drawTextAlignmentDemo, drawRectDemo, drawCircleDemo, drawProgressBarDemo,*/ drawImageDemo, drawTemperature, drawHumidity};
int demoLength = (sizeof(demos) / sizeof(Demo));
long timeSinceLastModeSwitch = 0;
void loop() {
// clear the display
display.clear();
// draw the current demo method
demos[demoMode]();
display.setTextAlignment(TEXT_ALIGN_RIGHT);
display.drawString(10, 128, String(millis()));
// write the buffer to the display
display.display();
if (millis() - timeSinceLastModeSwitch > DEMO_DURATION) {
demoMode = (demoMode + 1) % demoLength;
timeSinceLastModeSwitch = millis();
}
counter++;
delay(10);
//sht.readSensor();
// Listenning for new clients
WiFiClient client = server.available();
if (client) {
Serial.println("New client");
// bolean to locate when the http request ends
boolean blank_line = true;
while (client.connected()) {
if (client.available()) {
char c = client.read();
if (c == '\n' && blank_line) {
// Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
float h = dht.readHumidity(true);
// Read temperature as Celsius (the default)
float t = dht.readTemperature(false, false);
// Read temperature as Fahrenheit (isFahrenheit = true)
float f = dht.convertCtoF(t);
// Check if any reads failed and exit early (to try again).
if (isnan(h) || isnan(t) || isnan(f)) {
Serial.println("Failed to read from SHT sensor!");
strcpy(celsiusTemp,"Failed");
strcpy(fahrenheitTemp, "Failed");
strcpy(humidityTemp, "Failed");
}
else {
// Computes temperature values in Celsius + Fahrenheit and Humidity
float hic = dht.readTemperature(false,false);
//dht.computeHeatIndex(t, h, false);
dtostrf(hic, 6, 2, celsiusTemp);
float hif = dht.convertCtoF(hic);
//dht.computeHeatIndex(f, h);
dtostrf(hif, 6, 2, fahrenheitTemp);
float h = dht.readHumidity(false);
dtostrf(h, 6, 2, humidityTemp);
}
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("Connection: close");
client.println();
// your actual web page that displays temperature and humidity
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("<head></head><body><h1>ESP8266 - Temperature and Humidity</h1><h3>Temperature in Celsius: ");
client.println(celsiusTemp);
client.println("°C</h3><h3>Temperature in Fahrenheit: ");
client.println(fahrenheitTemp);
client.println("°F</h3><h3>Humidity: ");
client.println(humidityTemp);
client.println("%</h3><h3>");
client.println("</body></html>");
break;
}
if (c == '\n') {
// when starts reading a new line
blank_line = true;
}
else if (c != '\r') {
// when finds a character on the current line
blank_line = false;
}
}
}
// closing the client connection
delay(1);
client.stop();
Serial.println("Client disconnected.");
}
if (!Rtc.IsDateTimeValid())
{
// Common Cuases:
// 1) the battery on the device is low or even missing and the power line was disconnected
Serial.println("RTC lost confidence in the DateTime!");
}
RtcDateTime now = Rtc.GetDateTime();
printDateTime(now);
Serial.println();
RtcTemperature temp = Rtc.GetTemperature();
temp.Print(Serial);
// you may also get the temperature as a float and print it
// Serial.print(temp.AsFloatDegC());
Serial.println("C");
}
#define countof(a) (sizeof(a) / sizeof(a[0]))
void printDateTime(const RtcDateTime& dt)
{
char datestring[20];
snprintf_P(datestring,
countof(datestring),
PSTR("%02u/%02u/%04u %02u:%02u:%02u"),
dt.Month(),
dt.Day(),
dt.Year(),
dt.Hour(),
dt.Minute(),
dt.Second() );
Serial.print(datestring);
}
I would like to be able to plot temperature and humidity vs time.
Does anybody have any idea why the RTC is failing after the SH1106 is initialized??
